Senior Network Engineer

Public Trust: None

Requisition Type: Regular

Your Impact

Own your opportunity to work with the largest government agency in the nation. Make an impact by advancing the Department of Defense’s mission to keep our country safe and secure.

Job Description

Own your opportunity to work with the largest government agency in the nation. Make an impact by advancing the mission to keep our country safe and secure.

Key Skills for Success:

• Experience with Cisco IOS, Cisco Routers and Switches, Internet Protocol Security (IPsec), Switching Protocols, Virtual Private Networks (VPNs)

Principal Duties / Responsibilities:

• Design, plan, build, and maintain secure communications networks supporting enterprise and hybrid environments.

• Configure routers, switches, firewalls, and IPSec-based VPN solutions for LAN, WAN, and remote-access connectivity.

• Coordinate LAN/WAN hardware/software improvements and/or enhancements.

• Ensure network reliability, scalability, and compliance while leveraging automation and emerging technologies to enhance operational efficiency and support mission-critical business operations.

• Provide current network diagrams and other documentation.

• Display a comprehensive understanding of routing and switching protocols (OSPF, BGP, EIGRP, VLAN, Spanning Tree, Multicast).

• In-depth understanding of Cisco IOS platforms and practical knowledge of networking topologies (LAN, WAN) and hands-on experience with IPSec VPNs.

• Experience with network diagnostic, monitoring, and analysis tools (e.g., SolarWinds, Splunk).

• Design, implement, and maintain complex LAN/WAN infrastructures, including routing, switching, and secure VPN connectivity.

• Ensure network integrity, compliance with security policies, and proper backup and recovery processes.

• Install, configure, manage, and troubleshoot F5 BIG-IP systems to ensure applications are fast, available, and secure.

• Analyze, diagnose, and resolve complex performance and connectivity issues.

• Proven experience with Cisco Secure Firewalls (FTD/FMC), ISE, and 802.1x authentication, including device access troubleshooting on network switches.

• Evaluate and integrate new communications technologies to enhance network performance, security, and scalability.

• Create network diagrams using Microsoft Visio.

• Document network design and create Standard Operating Procedures for the installation and configuration of network devices.

• Maintain current knowledge of evolving network and automation technologies.

• Collaborate effectively with cross-functional teams and provide mentorship when needed.

• Linux system administration (RedHat Enterprise) preferred.

• Configure and administer Cisco routers, switches, secure firewalls, and ISE for identity-based access control and 802.1x authentication.

Required Qualifications:

• Must possess and maintain a TS/SCI clearance with lifestyle polygraph.

• Education: BA/BS degree or equivalent work experience.

• Experience: 8+ years of related experience.

• Certifications: DoD 8570.01, Cisco CCNP (active) required.

• Additional Certifications: Cisco CCNP Enterprise, CCNP Security, DevNet, F5 certification.

• US citizenship.

Desiree Qualification.

• Knowledge of Cisco Catalyst and Cisco Nexus series switches.

• Knowledge of F5 BIG-IP.

• Knowledge of Cisco ISR Gen2 (1900, 2900, 3900 series) and ISR Gen3 (4000 series) routers.

• Knowledge of Cisco Firepower series firewalls.

• Knowledge (including installation) of NSA Cryptographic devices (KG-175, KG-250).

• Knowledge of configuration of Cisco IOS 15.x, Cisco IOS-XE 16.x, and NX-OS 9.x.

Location:

• On Customer Site

Citizenship:

• US Citizenship Required

GDIT IS YOUR PLACE
At GDIT, the mission is our purpose, and our people are at the center of everything we do.
● Growth: AI-powered career tool that identifies career steps and learning opportunities
● Support: An internal mobility team focused on helping you achieve your career goals
● Rewards: Comprehensive benefits and wellness packages, 401K with company match, and competitive pay and paid time off
● Flexibility: Full-flex work week to own your priorities at work and at home ***remove if ineligible***
● Community: Award-winning culture of innovation and a military-friendly workplace

OWN YOUR OPPORTUNITY
Explore an enterprise IT career at GDIT and you’ll find endless opportunities to grow alongside colleagues who share your desire to drive operations forward. #armajobs

Work Requirements

Years of Experience

8 + years of related experience

* may vary based on technical training, certification(s), or degree

Certification

Certified Network Professional Enterprise (CCNP) | Cisco - Cisco

Travel Required

Less than 10%

Citizenship

U.S. Citizenship Required